A government in which a city ad county government have joined to form a single government is called a consolidated city and county government.
A city/county government have jointed to form a single government is called a consolidated city/county government.
. . . a consolidated city-county .
autocratic government
It is called a saturated hydrocarbon or an alkane.
If the compounds only contain carbon and hydrogen, they are called alkanes.
The theory is called continental drift, proposed by Alfred Wegener in the early 20th century. It suggests that at one point in Earth's history, all continents were connected into a single supercontinent called Pangaea. Over millions of years, the continents drifted apart to their current positions.
A single arm of a chromosome is called a chromatid. During cell division, each chromosome consists of two sister chromatids that are joined together at a region called the centromere.
titan
Two or more atoms joined into a single particle from what
If the government is run by a single person, sometimes it's called a dictatorship, regardless of the title that the single person assumes.
Burlington County does not have a single mayor, as it is a county in New Jersey composed of multiple municipalities, each with its own mayor. The county government is led by a Board of Commissioners. For specific mayoral information, you would need to refer to the individual municipalities within Burlington County.
Government by the few is an oligarchy, by a single powerful ruler an autocracy, and by the landed gentry an aristocracy.